On Tue, Dec 13, 2016 at 11:18:31AM +0100, Dominik Vogt wrote:
> > IMHO you want something like x86 avx_runtime effective target
> > (z13_runtime?), which would stand for running on z13 capable hw and
> > with z13 assembler support.
>
> Something like that, yes, but it's not so easy because the kernel
> has to support it too. Some features are disabled in a VM
> although the hardware supports them. What we really need is
The z13_runtime or whatever effective target routine can always
just try to compile/link a simple testcase with at least one z13 specific
instruction and try to run it.
> Run test if the test system (not just the hardware) supports the
> instruction set of the -march= option the test was compiled
> with, otherwise just compile it.
>
> I.e. derive the "effective_targt..." option from the "-march=..."
> option set by the torture test.
>
> > Or choose what options to include based on such effective target tests,
> > and perhaps also select a default action, like we do on some targets e.g. in
> > the vectorizer.
>
> Can you give an example test file, please?
Look e.g. at gcc.dg/vect/vect.exp and testsuite/lib/*.exp for
dg-do-what-default and the games done with it. E.g. if you set
(and saved/restored) in addition to dg-do-what-default also EFFECTIVE_TARGETS
then perhaps you could use et-dg-runtest or similar.
Jakub
